Não informado. (2000). Twentieth century. Twentieth Century.
Lua i Stíl Chicago (17ú heag.)Não informado. Twentieth Century. London: Twentieth Century, 2000.
Lua MLA (8ú heag.)Não informado. Twentieth Century. Twentieth Century, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.